Sanitizing Genesys Cloud Knowledge Base Markdown via Knowledge APIs with Java

What You Will Build

• A Java service that preprocesses, validates, and sanitizes markdown content before ingestion into Genesys Cloud Knowledge.
• Uses the Genesys Cloud Java SDK and REST APIs for document creation, version management, preview generation, and webhook registration.
• Language: Java 17 with Maven dependencies.

Prerequisites

• Genesys Cloud OAuth client configured as Confidential with Client Credentials flow enabled
• Required OAuth scopes: knowledge:document:write, knowledge:version:write, knowledge:version:read, webhook:write, webhook:read
• SDK version: genesyscloud-java-sdk 14.0.0 or later
• Runtime: Java 17 or later, Maven 3.8+
• External dependencies: org.jsoup:jsoup 1.16.1, com.fasterxml.jackson.core:jackson-databind 2.15.2

Authentication Setup

Genesys Cloud requires OAuth 2.0 Client Credentials for server-to-server integrations. The Java SDK handles token acquisition and automatic refresh, but you must initialize the AuthenticationClient before accessing any API surface.

import com.mypurecloud.sdk.v2.ApiClient;
import com.mypurecloud.sdk.v2.auth.AuthenticationClient;
import com.mypurecloud.sdk.v2.auth.OAuth2ClientCredentials;
import com.mypurecloud.sdk.v2.exceptions.ApiException;
import com.mypurecloud.sdk.v2.PureCloudPlatformClientV2;

import java.time.Duration;

public class GenesysAuth {
    private final ApiClient apiClient;
    private final PureCloudPlatformClientV2 platformClient;

    public GenesysAuth(String environment, String clientId, String clientSecret) throws ApiException {
        this.apiClient = new ApiClient();
        this.apiClient.setEnvironment(environment); // e.g., "mypurecloud.com"
        
        AuthenticationClient authClient = new AuthenticationClient(apiClient);
        OAuth2ClientCredentials credentials = new OAuth2ClientCredentials(clientId, clientSecret);
        
        // Token caching is handled internally by the SDK. 
        // The SDK automatically refreshes before expiration.
        authClient.clientCredentials(credentials);
        
        this.platformClient = new PureCloudPlatformClientV2(apiClient);
    }

    public ApiClient getApiClient() {
        return apiClient;
    }

    public PureCloudPlatformClientV2 getPlatformClient() {
        return platformClient;
    }
}

OAuth scope requirement: No specific scope is required for token acquisition. The scopes are validated at the API endpoint level during request execution.

Implementation

Step 1: Initialize SDK and Configure Retry Logic

Genesys Cloud enforces rate limits on Knowledge API endpoints. You must implement exponential backoff for 429 responses. The SDK does not retry automatically, so you will wrap API calls in a retry utility.

import com.mypurecloud.sdk.v2.exceptions.ApiException;
import java.util.concurrent.TimeUnit;

public class ApiRetryHandler {
    private static final int MAX_RETRIES = 3;
    private static final long INITIAL_DELAY_MS = 1000;

    public static <T> T executeWithRetry(Runnable setup, java.util.function.Supplier<T> apiCall) throws ApiException {
        int attempts = 0;
        long delay = INITIAL_DELAY_MS;
        Exception lastException = null;

        while (attempts < MAX_RETRIES) {
            try {
                if (setup != null) setup.run();
                return apiCall.get();
            } catch (ApiException e) {
                lastException = e;
                if (e.getCode() == 429) {
                    attempts++;
                    try {
                        Thread.sleep(delay);
                        delay *= 2; // Exponential backoff
                    } catch (InterruptedException ie) {
                        Thread.currentThread().interrupt();
                        throw new RuntimeException("Retry interrupted", ie);
                    }
                } else {
                    throw e; // Fail immediately on 4xx/5xx non-rate-limit errors
                }
            }
        }
        throw new RuntimeException("Max retries exceeded for 429", lastException);
    }
}

Step 2: Construct Sanitizing Payloads and Validate Constraints

Genesys Cloud Knowledge enforces a maximum markdown content size of 65536 bytes per version. You must validate the schema, strip XSS payloads, normalize tables, and verify link safety before transmission.

import org.jsoup.Jsoup;
import org.jsoup.safety.Safelist;
import java.util.regex.Pattern;

public class MarkdownSanitizer {
    private static final int MAX_MARKDOWN_SIZE = 65536;
    private static final Pattern TABLE_ROW_PATTERN = Pattern.compile("^\\|([^|]+)\\|\\s*$");
    private static final Pattern LINK_PATTERN = Pattern.compile("\\[([^\\]]+)\\]\\(([^)]+)\\)");
    private static final Pattern UNSAFE_PROTOCOL_PATTERN = Pattern.compile("^(javascript|data|vbscript):", Pattern.CASE_INSENSITIVE);

    public static class SanitizeResult {
        public final String cleanedMarkdown;
        public final boolean isValid;
        public final String errorMessage;
        public final long processingLatencyMs;

        public SanitizeResult(String cleanedMarkdown, boolean isValid, String errorMessage, long processingLatencyMs) {
            this.cleanedMarkdown = cleanedMarkdown;
            this.isValid = isValid;
            this.errorMessage = errorMessage;
            this.processingLatencyMs = processingLatencyMs;
        }
    }

    public static SanitizeResult sanitize(String rawMarkdown) {
        long start = System.currentTimeMillis();
        if (rawMarkdown == null || rawMarkdown.getBytes(java.nio.charset.StandardCharsets.UTF_8).length > MAX_MARKDOWN_SIZE) {
            return new SanitizeResult(null, false, "Document exceeds maximum size limit of " + MAX_MARKDOWN_SIZE + " bytes.", System.currentTimeMillis() - start);
        }

        String processed = rawMarkdown;

        // XSS Payload Stripping via Jsoup Safelist
        // Convert markdown to temporary HTML, clean, then revert to markdown-like structure
        // Genesys accepts markdown, but we sanitize embedded HTML/script tags first
        processed = Jsoup.clean(processed, Safelist.relaxed().addAttributes("a", "href", "title").addProtocols("a", "href", "http", "https"));

        // Table Formatting Normalization
        String[] lines = processed.split("\n");
        StringBuilder normalized = new StringBuilder();
        boolean inTable = false;
        for (String line : lines) {
            if (line.trim().startsWith("|")) {
                if (!inTable) {
                    inTable = true;
                    normalized.append("\n");
                }
                String[] cells = line.split("\\|");
                StringBuilder row = new StringBuilder("|");
                for (int i = 1; i < cells.length - 1; i++) {
                    row.append(cells[i].trim()).append("|");
                }
                normalized.append(row).append("\n");
            } else {
                if (inTable) {
                    inTable = false;
                    normalized.append("\n");
                }
                normalized.append(line).append("\n");
            }
        }
        processed = normalized.toString().trim();

        // Link Safety Verification Pipeline
        java.util.regex.Matcher matcher = LINK_PATTERN.matcher(processed);
        StringBuilder safeLinks = new StringBuilder();
        int lastEnd = 0;
        while (matcher.find()) {
            String url = matcher.group(2).trim();
            if (UNSAFE_PROTOCOL_PATTERN.matcher(url).find()) {
                processed = processed.replace(matcher.group(0), "[removed unsafe link]");
                matcher = LINK_PATTERN.matcher(processed); // Reset matcher after modification
                lastEnd = 0;
                continue;
            }
            safeLinks.append(matcher.group(0));
        }

        long end = System.currentTimeMillis();
        return new SanitizeResult(processed, true, null, end - start);
    }
}

OAuth scope requirement: None for local processing. This step runs entirely in-memory before network transmission.

Step 3: Atomic POST Operations and Preview Generation

You will create a document, create a version with the sanitized markdown, and immediately trigger the preview endpoint to verify rendering compatibility. The preview endpoint returns rendered HTML, which allows you to validate that table normalization and link safety did not break layout.

import com.mypurecloud.sdk.v2.api.KnowledgeApi;
import com.mypurecloud.sdk.v2.model.*;
import java.util.List;

public class KnowledgeDocumentManager {
    private final KnowledgeApi knowledgeApi;
    private final GenesysAuth auth;

    public KnowledgeDocumentManager(GenesysAuth auth) {
        this.auth = auth;
        this.knowledgeApi = auth.getPlatformClient().getKnowledgeApi();
    }

    public String createAndPreviewDocument(String title, String sanitizedContent, String spaceId) throws Exception {
        // Step 3a: Create Document
        DocumentCreateRequest docRequest = new DocumentCreateRequest()
                .title(title)
                .spaceId(spaceId)
                .draft(false)
                .status("published");
                
        Document createdDoc = ApiRetryHandler.executeWithRetry(null, () -> 
                knowledgeApi.postKnowledgeDocument(docRequest)
        );
        String documentId = createdDoc.getId();

        // Step 3b: Create Version with Sanitized Markdown
        DocumentVersionCreateRequest versionRequest = new DocumentVersionCreateRequest()
                .title(title)
                .content(sanitizedContent)
                .format("markdown")
                .locale("en-US")
                .status("published");

        DocumentVersion createdVersion = ApiRetryHandler.executeWithRetry(null, () ->
                knowledgeApi.postKnowledgeDocumentVersion(documentId, versionRequest)
        );
        String versionId = createdVersion.getId();

        // Step 3c: Trigger Automatic Preview Generation
        PostKnowledgeDocumentVersionPreviewRequest previewRequest = new PostKnowledgeDocumentVersionPreviewRequest()
                .format("html");
                
        DocumentVersionPreview preview = ApiRetryHandler.executeWithRetry(null, () ->
                knowledgeApi.postKnowledgeDocumentVersionPreview(documentId, versionId, previewRequest)
        );

        // Rendering Compatibility Check
        String renderedHtml = preview.getRenderedContent();
        if (renderedHtml.contains("undefined") || renderedHtml.contains("null")) {
            throw new IllegalStateException("Preview rendering failed. Markdown structure may be incompatible.");
        }

        return versionId;
    }
}

OAuth scope requirement: knowledge:document:write, knowledge:version:write, knowledge:version:read

Step 4: Webhook Sync, Latency Tracking, and Audit Logging

You will register a webhook to synchronize sanitized events with an external CMS, track processing latency, calculate clean success rates, and generate structured audit logs for governance.

import com.mypurecloud.sdk.v2.api.WebhookApi;
import com.mypurecloud.sdk.v2.model.*;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.time.Instant;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

public class SanitizationOrchestrator {
    private final GenesysAuth auth;
    private final KnowledgeDocumentManager docManager;
    private final WebhookApi webhookApi;
    private final ObjectMapper mapper = new ObjectMapper();
    
    private final AtomicLong totalLatencyMs = new AtomicLong(0);
    private final AtomicInteger successCount = new AtomicInteger(0);
    private final AtomicInteger failureCount = new AtomicInteger(0);
    private final List<String> auditLogs = new ArrayList<>();

    public SanitizationOrchestrator(GenesysAuth auth, String spaceId, String externalCmsUrl) throws Exception {
        this.auth = auth;
        this.docManager = new KnowledgeDocumentManager(auth);
        this.webhookApi = auth.getPlatformClient().getWebhookApi();
        registerCmsSyncWebhook(externalCmsUrl);
    }

    private void registerCmsSyncWebhook(String targetUrl) throws Exception {
        WebhookCreateRequest webhookRequest = new WebhookCreateRequest()
                .name("markdown-sanitized-cms-sync")
                .description("Syncs sanitized knowledge events to external CMS")
                .enabled(true)
                .events(List.of("knowledge:document.version.created"))
                .endpoint(targetUrl)
                .apiVersion("v2")
                .requestType("POST")
                .securityMode("none"); // Configure TLS/mTLS as required by your CMS

        ApiRetryHandler.executeWithRetry(null, () -> webhookApi.postWebhook(webhookRequest));
        logAudit("WEBHOOK_REGISTERED", targetUrl);
    }

    public void processDocument(String title, String rawMarkdown, String spaceId) {
        long operationStart = System.currentTimeMillis();
        try {
            MarkdownSanitizer.SanitizeResult sanitizeResult = MarkdownSanitizer.sanitize(rawMarkdown);
            
            if (!sanitizeResult.isValid()) {
                throw new IllegalArgumentException("Sanitization failed: " + sanitizeResult.getErrorMessage());
            }

            String versionId = docManager.createAndPreviewDocument(title, sanitizeResult.cleanedMarkdown, spaceId);
            
            long operationEnd = System.currentTimeMillis();
            long latency = operationEnd - operationStart;
            totalLatencyMs.addAndGet(latency);
            successCount.incrementAndGet();
            
            logAudit("SANITIZE_SUCCESS", String.format("{\"doc\":\"%s\",\"version\":\"%s\",\"latencyMs\":%d,\"cleanSize\":%d}", 
                    title, versionId, latency, sanitizeResult.cleanedMarkdown.length()));
            
        } catch (Exception e) {
            failureCount.incrementAndGet();
            logAudit("SANITIZE_FAILURE", String.format("{\"doc\":\"%s\",\"error\":\"%s\",\"latencyMs\":%d}", 
                    title, e.getMessage(), System.currentTimeMillis() - operationStart));
        }
    }

    public double getCleanSuccessRate() {
        int total = successCount.get() + failureCount.get();
        return total == 0 ? 0.0 : (double) successCount.get() / total;
    }

    public long getAverageLatencyMs() {
        int total = successCount.get() + failureCount.get();
        return total == 0 ? 0 : totalLatencyMs.get() / total;
    }

    private void logAudit(String event, String payload) {
        String logEntry = String.format("{\"timestamp\":\"%s\",\"event\":\"%s\",\"data\":%s}", 
                Instant.now().toString(), event, payload);
        auditLogs.add(logEntry);
        System.out.println(logEntry);
    }
}

OAuth scope requirement: webhook:write, webhook:read

Complete Working Example

import com.mypurecloud.sdk.v2.exceptions.ApiException;

public class GenesysKnowledgeSanitizerMain {
    public static void main(String[] args) {
        String environment = "mypurecloud.com";
        String clientId = System.getenv("GENESYS_CLIENT_ID");
        String clientSecret = System.getenv("GENESYS_CLIENT_SECRET");
        String spaceId = System.getenv("GENESYS_SPACE_ID");
        String externalCmsUrl = System.getenv("EXTERNAL_CMS_WEBHOOK_URL");

        if (clientId == null || clientSecret == null || spaceId == null || externalCmsUrl == null) {
            System.err.println("Missing required environment variables.");
            System.exit(1);
        }

        try {
            GenesysAuth auth = new GenesysAuth(environment, clientId, clientSecret);
            SanitizationOrchestrator orchestrator = new SanitizationOrchestrator(auth, spaceId, externalCmsUrl);

            String rawMarkdown = """
                # Product Update
                Check out <script>alert('xss')</script> our new features.
                | Feature | Status |
                |---|---|
                | Login | Stable |
                | Payment | Testing |
                Click [here](javascript:void(0)) for details.
                """;

            orchestrator.processDocument("Q3 Product Updates", rawMarkdown, spaceId);

            System.out.printf("Clean Success Rate: %.2f%%\n", orchestrator.getCleanSuccessRate() * 100);
            System.out.printf("Average Latency: %d ms\n", orchestrator.getAverageLatencyMs());

        } catch (ApiException e) {
            System.err.printf("API Error %d: %s\n", e.getCode(), e.getMessage());
            if (e.hasResponseEntity()) {
                System.err.println("Response: " + e.getResponseBody());
            }
        } catch (Exception e) {
            System.err.println("Execution failed: " + e.getMessage());
            e.printStackTrace();
        }
    }
}

Common Errors & Debugging

Error: 401 Unauthorized

• What causes it: Missing or expired OAuth token, incorrect client credentials, or environment mismatch (e.g., mypurecloud.com vs usw2.pure.cloud).
• How to fix it: Verify the GENESYS_CLIENT_ID and GENESYS_CLIENT_SECRET environment variables. Ensure the OAuth client is configured for Client Credentials flow. Check that the SDK environment matches your Genesys Cloud deployment.
• Code showing the fix: The GenesysAuth constructor validates credentials immediately. If authentication fails, the SDK throws an ApiException with code 401. Wrap initialization in a try-catch block and log the exact error payload.

Error: 403 Forbidden

• What causes it: The OAuth client lacks required scopes, or the service account does not have permission to write to the specified Knowledge Space.
• How to fix it: Assign knowledge:document:write, knowledge:version:write, and knowledge:version:read to the OAuth client. Verify the service account belongs to a role with Knowledge Administrator or Writer permissions on the target space.
• Code showing the fix: No code change is required. Update the OAuth client configuration in the Genesys Cloud Admin console under Organization > OAuth Clients.

Error: 429 Too Many Requests

• What causes it: Rate limit exceeded on Knowledge or Webhook endpoints.
• How to fix it: The ApiRetryHandler implements exponential backoff. If failures persist, reduce batch throughput or implement request queuing. Monitor the Retry-After header if present.
• Code showing the fix: The retry logic in ApiRetryHandler.executeWithRetry automatically handles 429 responses with increasing delays up to 3 attempts.

Error: 500 Internal Server Error or Preview Rendering Failure

• What causes it: Malformed markdown that breaks Genesys Cloud rendering engine, or table structure mismatch.
• How to fix it: The sanitizer normalizes pipes and strips unsupported HTML. If preview fails, inspect the renderedContent from the preview endpoint. Remove nested lists inside tables or unsupported markdown extensions.
• Code showing the fix: The createAndPreviewDocument method validates renderedContent for undefined or null markers. Catch IllegalStateException and log the raw markdown for manual review.

Official References

• Genesys Cloud Knowledge API Documentation
• Genesys Cloud Java SDK Reference
• OAuth 2.0 Client Credentials Flow
• Knowledge Webhook Events